Is It Ok To Reuse Canning Lids? [SOLVED!]

If you have canning lids that you’ve already used, is it safe to reuse them again? The simple answer is no: Canning lids are designed for one-time use 👍 Using them more than once may result in your jars not sealing properly 🙈 These lids have a special sealing compound around the rim that is only good for one use. So, if your jars fail to seal properly the first time, you have to put fresh lids on your jars before you reprocess them. And you definitely shouldn’t reuse your lids from year to year, no matter how tempting it may be to save a few dollars. Risking your health just isn’t worth the small amount that you’ll save by reusing your lids. [1]
Tattler Lids do require a bit of variation from conventional metal lids. Being a two piece combination with a rubber gasket ring, Tattler Lids must remain a bit loose during processing in order for the jar to vent the pressure that has built in the jar during processing. An online customer gave us a very good tip on how tight is ‘Just Right’. To get the feel for the correct tightness prior to processing, place the jar on a counter top or other smooth surface, then place your index finger on the lid (do not apply too much pressure while tightening the metal band). Screw the metal band on until the jar begins to spin on the counter top (or other smooth surface). This is the perfect tightness for processing! (we really thank Loan Corbin after pointing this out). [2]
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Texashomesteader.com also explains that tattler Lids do require a bit of variation from conventional metal lids. Being a two piece combination with a rubber gasket ring, Tattler Lids must remain a bit loose during processing in order for the jar to vent the pressure that has built in the jar during processing. An online customer gave us a very good tip on how tight is ‘Just Right’. To get the feel for the correct tightness prior to processing, place the jar on a counter top or other smooth surface, then place your index finger on the lid (do not apply too much pressure while tightening the metal band). Screw the metal band on until the jar begins to spin on the counter top (or other smooth surface). This is the perfect tightness for processing! [3]
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Treehugger.com goes on to describe that these are the most common types of canning lids found in the market. They come in two pieces and you can identify them by the sealing compound along the rim of the lid. Under the tin, a thin layer or liner known as plastisol has been added to expand when the jar is heated. In order to create a perfect seal, that waxy compound is designed to expand and fill in any space caused by air bubbles. By using it multiple times, you risk the failure of a seal that no longer binds properly or efficiently. This could potentially lead to bacteria or residue contaminating the food. (credit goes to Dewaine Soriano from Shizuishan, China for their insights). [4]
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Article References

  1. https://www.thespruceeats.com/can-you-reuse-canning-lids-1389094
  2. https://modernsurvivalblog.com/survival-kitchen/can-i-reuse-canning-lids-on-my-jars-some-say-yes-most-say-no/
  3. https://texashomesteader.com/reusable-canning-lids/
  4. https://www.treehugger.com/can-you-reuse-canning-lids-5094982
Mehreen Alberts

Written by Mehreen Alberts

I'm a creative writer who has found the love of writing once more. I've been writing since I was five years old and it's what I want to do for the rest of my life. From topics that are close to my heart to everything else imaginable!

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